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Observation of the Kohn anomaly near the K point of bilayer graphene by Mafra, D. L.; Malard, L. M.; Doorn, S. K.; Htoon, H.; Nilsson, J.; Neto, A. H. Castro; Pimenta, M. A. is a scholarly article available to read on EtoBox.

What is Observation of the Kohn anomaly near the K point of bilayer graphene about?

The dispersion of electrons and phonons near the K point of bilayer graphene was investigated in a resonant Raman study using different laser excitation energies in the near infrared and visible range. The electronic structure was analyzed within the tight-binding approximation, and the Slonczewski-Weiss-McClure (SWM) parameters were obtained from the analysis of the dispersive behavior of the Raman features. A softening of the phonon branches was observed near the K point, and results evidence the Kohn anomaly and the importance of considering electron-phonon and electron-electron interactions to correctly describe the phonon dispersion in graphene systems.

Author

Mafra, D. L.; Malard, L. M.; Doorn, S. K.; Htoon, H.; Nilsson, J.; Neto, A. H. Castro; Pimenta, M. A.

Published

2009

Language

EN